#include "editdialog.h"int uniqueCarId;int uniqueFactoryId;Dialog::Dialog(QSqlRelationalTableModel *cars, QSqlTableModel *factory,QDomDocument details,               QFile *output, QWidget *parent)     : QDialog(parent){    carModel = cars;		factoryModel = factory;    carDetails = details;    outputFile = output;    QGroupBox *inputWidgetBox = createInputWidgets();    QDialogButtonBox *buttonBox = createButtons();    QVBoxLayout *layout = new QVBoxLayout;    layout->addWidget(inputWidgetBox);    layout->addWidget(buttonBox);    setLayout(layout);    setWindowTitle(tr("添加產品"));}void Dialog::submit(){    QString factory = factoryEditor->text();    QString address = addressEditor->text();    QString name = carEditor->text();    if (factory.isEmpty() || address.isEmpty()||name.isEmpty()) {        QString message(tr("請輸入廠名、廠址和商品名稱！"));        QMessageBox::information(this, tr("添加產品"), message);    } else {        int factoryId = findFactoryId(factory);				if(factoryId == -1){						factoryId = addNewFactory(factory,address);				}        int carId = addNewCar(name, factoryId);        QStringList attribs;        attribs = attribEditor->text().split(";", QString::SkipEmptyParts);        addAttribs(carId, attribs);//         increaseAlbumCount(indexOfArtist(artist));        accept();    }}int Dialog::findFactoryId(const QString &factory){// 		QSqlTableModel *factoryModel = carModel->relationModel(2);    int row = 0;    while (row < factoryModel->rowCount()) {        QSqlRecord record = factoryModel->record(row);        if (record.value("manufactory") == factory)            return record.value("id").toInt();        else            row++;    }    return -1;}int Dialog::addNewFactory(const QString &factory,const QString &address){    QSqlRecord record;    int id = generateFactoryId();    QSqlField f1("id", QVariant::Int);    QSqlField f2("manufactory", QVariant::String);    QSqlField f3("address", QVariant::String);    f1.setValue(QVariant(id));    f2.setValue(QVariant(factory));    f3.setValue(QVariant(address));    record.append(f1);    record.append(f2);    record.append(f3);    factoryModel->insertRecord(-1, record);    return id;}int Dialog::addNewCar(const QString &name, int factoryId){    int id = generateCarId();    QSqlRecord record;    QSqlField f1("carid", QVariant::Int);    QSqlField f2("name", QVariant::String);    QSqlField f3("factoryid", QVariant::Int);    QSqlField f4("year", QVariant::Int);    f1.setValue(QVariant(id));    f2.setValue(QVariant(name));    f3.setValue(QVariant(factoryId));    f4.setValue(QVariant(yearEditor->value()));    record.append(f1);    record.append(f2);    record.append(f3);    record.append(f4);    carModel->insertRecord(-1, record);    return id;}void Dialog::addAttribs(int carId, QStringList attribs){    QDomElement carNode = carDetails.createElement("car");    carNode.setAttribute("id", carId);    for (int i = 0; i < attribs.count(); i++) {        QString attribNumber = QString::number(i+1);        if (i < 10)            attribNumber.prepend("0");        QDomText textNode = carDetails.createTextNode(attribs.at(i));        QDomElement attribNode = carDetails.createElement("attrib");        attribNode.setAttribute("number", attribNumber);        attribNode.appendChild(textNode);        carNode.appendChild(attribNode);    }    QDomNodeList archive = carDetails.elementsByTagName("archive");    archive.item(0).appendChild(carNode);//     The following code is commented out since the example uses an in//     memory database, i.e., altering the XML file will bring the data//     out of sync.    if (!outputFile->open(QIODevice::WriteOnly)) {        return;    } else {        QTextStream stream(outputFile);        archive.item(0).save(stream, 4);        outputFile->close();    }}void Dialog::revert(){    factoryEditor->clear();		addressEditor->clear();    carEditor->clear();    yearEditor->setValue(QDate::currentDate().year());    attribEditor->clear();}QGroupBox *Dialog::createInputWidgets(){    QGroupBox *box = new QGroupBox(tr("添加產品"));    QLabel *factoryLabel = new QLabel(tr("制造商:"));    QLabel *addressLabel = new QLabel(tr("廠址:"));		    QLabel *carLabel = new QLabel(tr("品牌:"));    QLabel *yearLabel = new QLabel(tr("上市時間:"));    QLabel *attribLabel = new QLabel(tr("產品屬性 (由分號;隔開):"));    factoryEditor = new QLineEdit;    carEditor = new QLineEdit;		addressEditor = new QLineEdit;    yearEditor = new QSpinBox;    yearEditor->setMinimum(1900);    yearEditor->setMaximum(QDate::currentDate().year());    yearEditor->setValue(yearEditor->maximum());    yearEditor->setReadOnly(false);    attribEditor = new QLineEdit;    QGridLayout *layout = new QGridLayout;    layout->addWidget(factoryLabel, 0, 0);    layout->addWidget(factoryEditor, 0, 1);    layout->addWidget(addressLabel, 1, 0);    layout->addWidget(addressEditor, 1, 1);				    layout->addWidget(carLabel, 2, 0);    layout->addWidget(carEditor, 2, 1);    layout->addWidget(yearLabel, 3, 0);    layout->addWidget(yearEditor, 3, 1);    layout->addWidget(attribLabel, 4, 0, 1, 2);    layout->addWidget(attribEditor, 5, 0, 1, 2);    box->setLayout(layout);    return box;}QDialogButtonBox *Dialog::createButtons(){    QPushButton *closeButton = new QPushButton(tr("關閉"));    QPushButton *revertButton = new QPushButton(tr("撤銷"));    QPushButton *submitButton = new QPushButton(tr("提交"));    closeButton->setDefault(true);    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));    connect(revertButton, SIGNAL(clicked()), this, SLOT(revert()));    connect(submitButton, SIGNAL(clicked()), this, SLOT(submit()));    QDialogButtonBox *buttonBox = new QDialogButtonBox;    buttonBox->addButton(submitButton, QDialogButtonBox::ResetRole);    buttonBox->addButton(revertButton, QDialogButtonBox::ResetRole);    buttonBox->addButton(closeButton, QDialogButtonBox::RejectRole);    return buttonBox;}int Dialog::generateFactoryId(){    uniqueFactoryId += 1;    return uniqueFactoryId;}int Dialog::generateCarId(){    uniqueCarId += 1;    return uniqueCarId;}